YX4525
YX4525 (Republic Airways) is a multi-stop service on 22 routes, busiest Pittsburgh to Chicago. Of 454 departures recorded from October 2024 to July 2026, 84.3% left on time, according to the US BTS.
- On-time departures84.3%of 454 flights
- Average delay6.7 min
- July 202618▲ 125.0%vs July 2025
- Cancelled3.1%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 2 | ▼ 92.0% |
| February | 26 | 18 | ▼ 30.8% |
| March | 30 | 31 | ▲ 3.3% |
| April | 30 | 6 | ▼ 80.0% |
| May | 58 | 1 | ▼ 98.3% |
| June | 18 | 12 | ▼ 33.3% |
| July | 8 | 18 | ▲ 125.0% |
| August | 14 | – | – |
| September | 24 | – | – |
| October | 25 | – | in progress |
| November | 24 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Jul) | 195 | 88 | ▼ 54.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 87.5% | 100.0% | ▲ 14.3% |
| February | 83.3% | 80.0% | ▼ 4.0% |
| March | 96.7% | 72.4% | ▼ 25.1% |
| April | 96.7% | 100.0% | ▲ 3.4% |
| May | 89.3% | 100.0% | ▲ 12.0% |
| June | 66.7% | 60.0% | ▼ 10.0% |
| July | 50.0% | 83.3% | ▲ 66.7% |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 84.0% | – | in progress |
| November | 73.9% | – | – |
| December | 61.1% | – | – |
| Year-to-date average (Jan–Jul) | 81.4% | 85.1% | ▲ 4.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 2 | 3 | ▲ 50.0% |
| March | 0 | 2 | – |
| April | 0 | 1 | – |
| May | 2 | 0 | ▼ 100.0% |
| June | 0 | 2 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 8 | ▲ 60.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 96.9% 440
- Cancelled 3.1% 14
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PIT ORD Pittsburgh International Airport – Chicago O'Hare International Airport | 662 | 12.4 min | 77.8% | 82 |
| DCA PHL Ronald Reagan Washington National Airport – Philadelphia International Airport | 192 | 1.1 min | 87.0% | 79 |
| JFK ORD John F. Kennedy International Airport – Chicago O'Hare International Airport | 1,188 | 13.9 min | 79.2% | 54 |
| PVD ORD Rhode Island T. F. Green International Airport – Chicago O'Hare International Airport | 1,363 | -5.3 min | 100.0% | 31 |
| HHH DCA Hilton Head Airport – Ronald Reagan Washington National Airport | 808 | 13.2 min | 83.3% | 31 |
| DCA HHH Ronald Reagan Washington National Airport – Hilton Head Airport | 808 | 2.7 min | 90.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 16 | 16 | 81.3% | 0 |
| January 2025 | 25 | 24 | 87.5% | 1 |
| February 2025 | 26 | 24 | 83.3% | 2 |
| March 2025 | 30 | 30 | 96.7% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 58 | 56 | 89.3% | 2 |
| June 2025 | 18 | 18 | 66.7% | 0 |
| July 2025 | 8 | 8 | 50.0% | 0 |
| August 2025 | 14 | 14 | 100.0% | 0 |
| September 2025 | 24 | 24 | 100.0% | 0 |
| October 2025 | 25 | 25 | 84.0% | 0 |
| November 2025 | 24 | 23 | 73.9% | 1 |
| December 2025 | 18 | 18 | 61.1% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 18 | 15 | 80.0% | 3 |
| March 2026 | 31 | 29 | 72.4% | 2 |
| April 2026 | 6 | 5 | 100.0% | 1 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 12 | 10 | 60.0% | 2 |
| July 2026 | 18 | 18 | 83.3% | 0 |